! pipedum_17a.scl ! 245/243, 525/512, 1728/1715, Paul Erlich, 2001 17 ! 28/27 35/32 245/216 7/6 128/105 9/7 4/3 48/35 35/24 3/2 14/9 105/64 12/7 432/245 64/35 27/14 2/1